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e-lub [12.9K]
3 years ago
13

Solve the missing variable. Show your process please because I did the other three on my homework sheet but I really struggle wi

th math. Will definitely give brainly because this means a lot :)
-8.4b - 4.2 = 12.6

Is this -2 or?
Mathematics
2 answers:
kotykmax [81]3 years ago
5 0

Follow these steps:

-8.4b - 4.2 = 12.6

Add 4.2 on both sides:

-8.4b = 16.8

Divide by -8.4 on both sides to give you the final answer of:

b = -2

So you're answer is indeed correct! Hope this helps and that the steps are clear enough!

tester [92]3 years ago
4 0
The big intention behind every step you take in these "find the value of x" problems is to isolate the x by doing PEMDAS in reverse and using the opposite operation. So I would do first is add the 4.2 on both sides. This is so that the 4.2 on the side of the x is canceled out. This makes
- 8.4b = 16.8
From here, since the opposite of multiplying is dividing, you divide both sides by -8.4. You can use a calculator to find the answer but you get
b =  - 2
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